ZEEMAN DEPENDENCE OF OPTICAL RF DOUBLE RESONANCES IN THE C4V CENTER CAF2-HO3+

The low-field Zeeman splitting of the superhyperfine resonances associ ated with the two lowest electronic states of the C4v centre of CaF2:H o3+ are measured using RF bleaching of spectral holes. The magnitude o f the splitting is consistent with an earlier determination of the enh anced magnetic moments of the ground state levels. In addition, the nu mber of observed superhyperfine Zeeman components indicates that there is fast electron-electron spin flip relaxation between the two ground electronic states.